Assignment messages acknowledging access attempt without assigning resources

1. A mobile station configured to interact with a base station subsystem (BSS), the mobile station enabled for power efficient operation (PEO) and capable of performing a multilateration timing advance (MTA) procedure, the mobile station comprising:

a processor; and,

a memory that stores processor-executable instructions, wherein the processor interfaces with the memory to execute the processor-executable instructions, whereby the mobile station is operable to:

receive an MTA request message for the mobile station to perform a radio access part of the MTA procedure;

transmit, to the BSS, a multilateration request message that indicates an Access Burst method for performing the MTA procedure;

receive, from the BSS, a packet assignment message acknowledging that the BSS received the multilateration request message without assigning packet resources for the mobile station, wherein the packet assignment message excludes packet resource assignment information;

determine that the packet assignment message excludes packet resource assignment information; and

in response to determining that the packet assignment message excludes packet resource assignment information, determine if the packet assignment message matches the multilateration request message transmitted to the BSS.

2. The mobile station of claim 1 , wherein the mobile station is further operable to determine if the packet assignment message matches the multilateration request message by determining if a Short ID field value included in an information element (IE) of the packet assignment message matches a Short ID field value included in the multilateration request message.

3. The mobile station of claim 2 , wherein the IE of the packet assignment message includes a plurality of Short ID field values allowing the BSS to address, within the packet assignment message, a plurality of mobile stations performing the MTA procedure using the Access Burst method.

4. The mobile station of claim 2 , wherein the IE of the packet assignment message is an IPA Rest Octets IE.

5. The mobile station of claim 1 , wherein the multilateration request message is an EGPRS MULTILATERATION REQUEST message, and the packet assignment message is an IMMEDIATE PACKET ASSIGNMENT message.

6. A method in a mobile station configured to interact with a base station subsystem (BSS), the mobile station enabled for power efficient operation (PEO) and capable of performing a multilateration timing advance (MTA) procedure, the method comprising:

receiving an MTA request message for the mobile station to perform a radio access part of the MTA procedure;

transmitting, to the BSS, a multilateration request message that indicates an Access Burst method for performing the MTA procedure;

receiving, from the BSS, a packet assignment message acknowledging that the BSS received the multilateration request message without assigning packet resources for the mobile station, wherein the packet assignment message excludes packet resource assignment information;

determining that the packet assignment message excludes packet resource assignment information; and

in response to determining that the packet assignment message excludes packet resource assignment information, determining if the packet assignment message matches the multilateration request message transmitted to the BSS.

7. The method of claim 6 , wherein determining if the packet assignment message matches the multilateration request message comprises determining if a Short ID field value included in an information element (IE) of the packet assignment message matches a Short ID field value included in the multilateration request message.

8. The method of claim 7 , wherein the IE of the packet assignment message includes a plurality of Short ID field values allowing the BSS to address, within the packet assignment message, a plurality of mobile stations performing the MTA procedure using the Access Burst method.

9. The method of claim 7 , wherein the IE of the packet assignment message is an IPA Rest Octets IE.

10. The method of claim 6 , wherein the multilateration request message is an EGPRS MULTILATERATION REQUEST message, and the packet assignment message is an IMMEDIATE PACKET ASSIGNMENT message.

11. A Base Station Subsystem (BSS) configured to interact with a mobile station, the mobile station enabled for power efficient operation (PEO) and capable of performing a multilateration timing advance (MTA) procedure, the BSS comprising:

a processor; and,

a memory that stores processor-executable instructions, wherein the processor interfaces with the memory to execute the processor-executable instructions, whereby the BSS is operable to:

receive, from the mobile station, a multilateration request message that indicates an Access Burst method for performing the MTA procedure;

set a Short ID field value included in an information element (IE) of a packet assignment message to a Short ID field value included in the multilateration request message;

code the packet assignment message to exclude packet resource assignment information; and

transmit, to the mobile station, the packet assignment message acknowledging that the BSS received the multilateration request message without assigning packet resources for the mobile station.

12. The BSS of claim 11 , wherein the IE of the packet assignment message includes a plurality of Short ID field values allowing the BSS to address, within the packet assignment message, a plurality of mobile stations performing the MTA procedure using the Access Burst method.

13. The BSS of claim 11 , wherein the multilateration request message is an EGPRS MULTILATERATION REQUEST message, and the packet assignment message is an IMMEDIATE PACKET ASSIGNMENT message.

14. The BSS of claim 11 , wherein the IE of the packet assignment message is an IPA Rest Octets IE.

15. A method in a Base Station Subsystem (BSS) configured to interact with a mobile station, the mobile station enabled for power efficient operation (PEO) and capable of performing a multilateration timing advance (MTA) procedure, the BSS comprising:

receiving, from the mobile station, a multilateration request message that indicates an Access Burst method for performing the MTA procedure;

setting a Short ID field value included in an information element (IE) of a packet assignment message to a Short ID field value included in the multilateration request message;

coding the packet assignment message to exclude packet resource assignment information; and

transmitting, to the mobile station, the packet assignment message acknowledging that the BSS received the multilateration request message without assigning packet resources for the mobile station.

16. The method of claim 15 , wherein the IE of the packet assignment message includes a plurality of Short ID field values allowing the BSS to address, within the packet assignment message, a plurality of mobile stations performing the MTA procedure using the Access Burst method.

17. The method of claim 15 , wherein the multilateration request message is an EGPRS MULTILATERATION REQUEST message, and the packet assignment message is an IMMEDIATE PACKET ASSIGNMENT message.

18. The method of claim 15 , wherein the IE of the packet assignment message is an IPA Rest Octets IE.